hartness



(No Model.) 2 Sheets -Sheet 1. J. HARTNESS. STOCK FEEDING MECHANISM FOR SCREW MACHINES.

N0. 425,377. Patented Apr 8,1890.

INVENTEIF}! \WL \MTNEEEEE me roams arrives 50.. mcmmiq, wlsnmcwcn,

2 SheetS-Sheet 2.

V QHARTNESS STOCK FEEDINQQFLMECHANISM FOR SCREW MACHINES. No. 425,377. Patented Apr, 8, 1890.

(No Model.)

- l mlll INVENT m WTNESEEE: j 0 v UNITED STATES PATENT rrIcE.

JAMES HARTNESS, OF SPRINGFIELD, VERMONT, ASSIGNOR TO THE JONES dz 7 LAMSON MACHINE COMPANY, OF SAME PLACE.

STOCK-FEEDING MECHANISM FOR SCREW-MACHINES.

SPECIFICATION forming part of Letters Patent No. 425,377, dated April 8, 1890.

Application filed October 21, 1889. Serial No. 327,626. (No model.)

To all whom it may concern: The same letters of reference indicate the Be it known that I, JAMES HARTNESS, of same parts in all the figures. Springfield, in the county of \Vindsor and In the drawings, CL represents the head- State of Vermont, have invented certain new stock of a screw-machine, and Z) represents 5 and useful Improvements in Stock-Feeding the rotary tubular spindle,which isjournaled Mechanism for Screw-Machines, of which the in hearings in the head-stock and is rotated following is a specification. by power applied in the usual or any suita- This invention has for its object to provide ble manner from a driving-shaft, the common improved means for feeding bars, rods, or way of applying power to the spindle being IO Wires of polygonal form through the holdingby a belt from the driving-shaft running on chucks of screw-machines without stopping one of a series of graduated pulleys c c c, aft-he rotary motion of said bars, rods, or wires, fixed to the spindle. The spindle is provided and without marring or defacing the angles at one end with a chuck d, having jaws arthereof. ranged to grasp the stock that is passed 15 To this end the invention consists, mainly, through the spindle. By stock I mean the in the combination of a rotary spindle, a bar, rod, or wire from which the screws,bolts, head or holder affixed thereto, a normally- &c., are made. The stock is rotated by the loose gear supported by said spindle, feedchuck, the latter being attached to and rotatrolls within said head, arranged at (opposite ing with the spindle, and while it is thus ro- 7o 20 sides of the axial center of the spindle and tated it is presented to the several tools head, said rolls being so connected to the which form the shank of the screw and the heads as to be revolved about said center by screw-threads thereon. The chuck may be the rotation of the head, means for holding of any suitable constructionfor example, and releasing the loose gear, and connections that shown in Letters Patent No. 412,027, 25 between said gear and the feed-rolls, whereby dated October 1, 1889.

the feed-rolls are rotated on their own axes The improved stock-feeding mechanism when said loose gear is held stationary, their constituting the present invention comprises revolving motion causing them to perpetuate a chambered head e, having a hub or sleeve the rotation of the bar, rod, or wire, and pree, which is placed upon and rigidly attached 3o venting marring or defacement of the angles to the rear end of the spindle b, so as to rothereof. tat'e therewith, a pair of feed-rolls f f, con- The invention also consists in certain comnected with said head and caused by the ro binations and details incidental to the own tation of the latter to revolve about the cenbination above set forth, all of which I wil ter of rotation of the head, and mechanism 35 now proceed to describe and claim. for rotating said feed rolls on their own In the accompanying drawings, forming a axes while they are revolving, each feed-roll part of this specification, Figure 1 represents having therefore a planetary motion, whereby a side elevation of the head-stock of a screwit is enabled to feed the stock while the lat machine provided with my improvements. for is rotating without slipping upon the stock 40 Fig. 2 represents an end view of the feed-rolland without scarring the angles thereof, as

carrying head mounted on the spindle of they would do if they did not revolve in unisaid headstock. Fig. Srepresents a side eleson with the rotation of the stock while .rovation of said head and of a portion of the tating to feed the stock forward. Each feedspindle. Fig. a represents an end view of roll is affixed to a shaft (,which is journaled 5 5 the head with its front plate removed. Fig. 5 in a bearing formed in an arm or carrier h. represents a section on line 5 5, Fig. 2. Fig. Said carrier is pivoted at one end on a shaft 6 represents asection on line 6 6, Fig. 5. Fig. 11, journaled in bearings in the head 6 and ar- 7 represents a section on line 77, Fig. 1,1ookranged parallel with the spindle I). Said ing toward the left. Fig. 8 represents a side shaft has a worm j, meshing with a worm-gear 50 view of the loose gear shown in section in 7.; on the feed-roll shaft g, and a spur-gear Z, Fig. 5. Y meshing with a gear 'm, which is mounted dle Z) and head 6, will be rotated and will ro-- tate the worm-shafts it, to which they are affixed, said worm-shafts rotating the shafts g g and the feed-rolls ff thereon,so that said rolls will have a planetary motion-that is,

' they will be rotated on their axes in addition to being revolved by the rotation of the spindle b and head e. The rotation of the rolls causes them to feed the stock, as will be readily seen. The revolving motion of the feed rolls coincides with the rotary motion of the stock, so that there is no such relative movement of the surface of the stock upon the peripheries of the rolls as there would be if the rolls were simply rotated on their own axes and not revolved in unison with the rotation of the stock. It will be seen, therefore, that stock of polygonal form in cross-section can be fed without injury to its angles, such as would be caused by the rubbing contact of the rotating stock with the feed-rolls if the feed-rolls did not revolve in unison with the rotation of the stock.

' When the gear m is released and allowed to rotate with the head e and. spindle b, the feed-rolls continue to revolve about the axis of the spindle and head in unison with the rotation of the stock; but they do not rotate, because there is no independent movement of the spur-gears Z Z relatively to the loose gear m; hence the feed-rolls bear idly on the stock.

Any suitable means may be employed for holding and releasing the gear m. I have here shown as the best means of which I am at present aware for this purpose a frictionband 0, encircling a sleeve 19, affixed to the gear m, and mechanism for tightening or compressing said band upon the sleeve 19, and thereby causing it to rigidly hold the gear m.

The band 0 is connected at one end by a screw q with an arm or bracket 7', affixed to the head-stock a, its other end being unattached and provided with an enlargement .9, having an inclined surface s, on which bears the beveled end of a slide 25. Said slide is fitted to move in a guide on the arm or bracket r and has a beveled end i, Fig. 1, which is arranged to' be acted on by the correspondinglybeveled end of aslide a, which extends at right angles with the slide t and is fitted to move endwise in guides in the head-stock a. The slide a, when moved in the direction indicated by the arrow in Fig. 1, moves the slide 25 toward the friction-band and causes the inclined end Means of slide 25 to so act on the inclined surface s on the face end of the band 0 as to compress the band upon the sleeve 19. WVhen the slide a is moved in the opposite direction, it allows the slide 25 to move back and release the friction-band.

The slide a may be given the described movements by means of gear-segment '0 on a rock-shaft 10, which is journaled in the headstock, said segment engaging rackteeth formed in the slide a. vided with a lever 00, whereby it may be rocked or partly rotated first in one direction and then in the other.

The rock-shaft w and its lever :10 are connected by an arm y, affixed to the rock-shaft, and a link .2, pivoted to the outer endof said arm, with the lower ends of levers a 6b, which are pivoted at b to a bracket c' on the head-stock and have trundle-rolls f at their The rock-shaft is pro-- upper ends, which enter a groove g in the collar 71/ on the chuck d. Said collar is movable on the chuck-body by means of the rockshaft w, lever x,1ink z, and levers a, and when moved in one direction presses the chuck-jaws inwardly and causes them to grasp the stock. When the collaris moved in the opposite direction, it releases the chuckjaws and causes the latter to release the stock.

A construction whereby the movement of a sleeve on a chuck-body, as above described,

is caused to open and close jaws in said body is shown in Patent No. 412,027, above referred to, although the present improvements are not confined to use with that particular chuck, but may be used with a chuck of any other suitable construction. The release of the chuck-jaws by the sleeve 1) is produced by the same motion of the rock-shaft to which moves the slide a in the direction required'to compress the friction-band and lock the gear m; hence the stock is released by the ehuck-jaws by the same movement that makes the feedrolls operative. p

The invention is not limited to the mechanism above described for locking and releasing the gear m, and said gear maybe locked and released by any other suitable mechanism without departing from the spirit of the invention.

The arms or carriers h and the feed-rolls thereon are pressed inwardly by springst" t", attached to the head or holder 6, said springs giving the feed-rolls a yielding pressure on the stock. The force of said springs maybe regulated by screws jj, inserted in the head or holder and bearing on the spring 1', as

shown in Figs. 4 and 6.

I claim- 1. The combination of a rotary spindle, a head or holder affixed thereto, a normallyloose gear supported by said spindle, feedrolls arranged at opposite sides of the axial center of the spindle and head and revolved about said center by the rotation of the spindle and head, means for holding and releasing said loose gear, and connections between said gear and the feed-rolls, whereby when said gear is held. stationary the feed-rolls are rotated on their own axes in addition to their revolving motion, the said feed-rolls being permitted to revolve idly about the axial center of the spindle without rotating on their axes when the said gear is released, as set forth.

2. The combination of a rotary spindle, a head or holder aifixed thereto, a normallyloose gear supported by said spindle, spurgears meshing with said loose gear and affixed to shafts journaled in the head or holder, feed-rolls within the head or holder, oonnections between said rolls and the spur-gears, and means for locking and releasing said loose gear, whereby when said loose gear is released it rotates withthe head and spindle without rotating the spur-gears and feed-rolls, the latter revolving idly about the axial center of the spindle, and when said loose gear is held it rotates said spur-gears and feed rolls, while the feed-rolls are revolving about the axial center of the spindle, as set forth.

3. The combination of a rotary spindle, a head or holder affixed thereto, a normallyloose gear support-ed by said spindle, spurgears meshing with said loose gear and affixed to shafts journaled in the head or holder, feed-rolls within the head or holder, connections between said rolls and the spur-gears, a friction-band encircling a sleeve affixed to the loose gear, and means for compressing and releasingsaid friction-band,and thereby alternately holding and releasing the loose gear, as set forth.

4. The combination of a rotary spindle, a head or holder aflixed thereto, a normallyloose gear supported by said spindle, spurgears meshing with said loose gear and affixed to shafts journaled in the head, worms on said shafts, arms or carriers pivoted on said shafts within the head or holder, and shafts journaled in said carriers, and provided at their outer ends with Worm-gears meshing with said worms and at their inner ends with feed-rolls, as set forth.

5. The combination of a rotary spindle, a head or holder affixed thereto, shafts '11 i, journaled in said head and provided with worms jj, holders 7a h, pivoted on said shafts, feed- 6. The combination of a rotary spindle, a head or holder affixed thereto, a normallyloose gear supported by said spindle and provided with a sleeve p, spur-gears meshing with said loose gear and affixed to shafts j ournaled in said head, feed-rolls within the head, connections between said rolls and the spurgears,whereby rotary movements maybe communicated from the open gears to the rolls, a friction-band encircling the sleeve p, and means for compressing and releasing said band, as set forth.

'7. The combination of a rotary spindle, a head or holder affixed thereto, a normallyloose gear supported by said spindle and pro vided with a sleeve 19, feed-rolls Within the head, connections, substantially as described, between said feed-rolls and loose gear, whereby the feed-rolls are rotated on their own axes when the said gear is held stationary, a friction-band encircling the sleeve 19 and secured at one end to a fixed support, a slide 1%, arranged to move the free end of said band and thereby compress the same on the sleeve p, and means for moving said slide to cause the alternate compression and release ofthe friction-band, as set forth.

8. The combination of a rotary spindle, a head or holder affixed thereto, a normallyloose gear supported by said spindle and provided with a sleeve 19, feed-rolls within the head, connections, substantially as described, between said feed-rolls and loose gear, whereby the feed-rolls are rotated on their own axes when the said gear is held stationary, a fricif tion-band encircling the sleeve 13 and secured at one end to a fixed support, a slide 25, arranged to move the free end of said band and thereby compress the same on the sleeve 19, a slide 11, arranged to move the slide '6, a rockshaft 10, engagedwith the slide a to give motion to the latter, a chuck having a j aw opening and closing sleeve h, and connections, substantially as described, between said sleeve and rock-shaft, whereby the friction-band is compressed and the chuck-jaws released by a single movement of the rock-shaft, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 15th day of October, A. D. 1889.

JAMES IIARTNESS.

Witnesses:

W. D. WooLsoN, O. G. RICHARDSON. 

